CrCl (ml/min) = Q x (140-age [yr]) x body wt [kg] 72 x serum creatinine [mg/dl] Q = 0.85 for females Q = 1.0 for males CrCl (ml/min) = K x (140-age [yr]) x body wt [kg] Serum creatinine [mol/L] K = 1.0 for females K = 1.23 for males